The Logitech K780 is a popular multi-device wireless Bluetooth keyboard. However, some Windows users may experience issues such as being unable to connect the keyboard or input not functioning properly.
This article will analyze the common causes behind the Logitech K780 not working on Windows and provide multiple solutions to help you restore full functionality quickly.
1. Common Causes of Logitech K780 Not Working on Windows
Unstable or disconnected Bluetooth connection
Malfunctioning Unifying Receiver driver
Low battery or the keyboard is not powered on
Windows Bluetooth service not running
Driver conflicts or outdated drivers
Improper pairing or corrupted pairing information
System Bluetooth module failure
Third-party security software blocking the connection
2. Fixes for Logitech K780 Keyboard Not Working
Method 1: Check Keyboard Battery
Make sure the keyboard is powered on (the switch is set to "ON").
Replace the battery with a new one or use fully charged rechargeable batteries.
Press any key and check if the indicator light turns on.
Method 2: Update Keyboard Drivers
Driver issues are one of the most common causes of the Logitech K780 not working. It's recommended to use the Driver Talent X tool, which automatically detects, downloads, and installs the most suitable drivers for your device with ease.
Click the Download button to install the latest version of Driver Talent X.
Launch the software and go to the Drivers tab, then select "Scan" to detect the status of all drivers.
Find the keyboard driver in the scan results and click the "Upgrade" button.
Restart your computer after the update to apply changes.
Method 3: Re-pair the Logitech Keyboard
Open Settings > Devices > Bluetooth & other devices on your Windows PC.
Find Logitech K780 and click "Remove device".
Turn Bluetooth off and on again on the keyboard to enter pairing mode.
Click "Add Bluetooth or other device" and re-pair your K780 keyboard.
Method 4: Check Windows Bluetooth Services
Press Win + R, type "services.msc", and press Enter.
Locate "Bluetooth Support Service".
Ensure its status is Running and the startup type is Automatic.
If it's not running, right-click and choose Start.
Method 5: Temporarily Disable Firewall and Antivirus
Some antivirus or firewall programs may block Bluetooth device communication.
Temporarily disable your antivirus software and Windows Firewall.
If the keyboard works, add Logitech K780 to the trusted list of your antivirus and firewall software.
Method 6: Use Logitech Unifying Receiver (if applicable)
If you're using a Logitech Unifying USB Receiver, make sure it's properly plugged in and functional.
Download and install Logitech Unifying Software, then reconnect the K780.
Note: The K780 supports both Bluetooth and Unifying Receiver. Ensure you're using the correct connection mode.
Method 7: Run Windows Troubleshooter
Press Win + I to open Settings, then go to "Update & Security".
Select "Troubleshoot", then click "Additional troubleshooters".
Find "Bluetooth" and click "Run the troubleshooter".
Follow the on-screen instructions to complete the process.
3. Frequently Asked Questions (FAQ)
Q1: The K780 is connected but not typing—what should I do?
A: Try unplugging and reconnecting the receiver, or re-pair the device via Bluetooth.
Q2: Why does my keyboard frequently disconnect?
A: Use the keyboard closer to the computer, minimize interference from other wireless devices, and ensure drivers are up to date.
Q3: Can the K780 connect to multiple devices? How do I switch?
A: Yes, it supports up to three devices. Use the Easy-Switch buttons on the keyboard to toggle between them.
Issues with the Logitech K780 not working on Windows are often caused by Bluetooth connectivity problems, driver errors, or disabled system services.
By following the above steps, most problems can be resolved easily. Regularly updating your system and drivers will help ensure stable performance and a smooth typing experience.
